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Simic P, Pljesa I, Nejkovic L, Jerotic D, Coric V, Stulic J, Kokosar N, Popov D, Savic-Radojevic A, Pazin V, Pljesa-Ercegovac M. Glutathione Transferase P1: Potential Therapeutic Target in Ovarian Cancer. Medicina (B Aires) 2022; 58:medicina58111660. [PMID: 36422199 PMCID: PMC9696103 DOI: 10.3390/medicina58111660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/07/2022] [Accepted: 11/15/2022] [Indexed: 11/18/2022] Open
Abstract
Chemotherapy resistance of ovarian cancer, regarded as the most lethal malignant gynecological disease, can be explained by several mechanisms, including increased activity of efflux transporters leading to decreased intracellular drug accumulation, increased efflux of the therapeutic agents from the cell by multidrug-resistance-associated protein (MRP1), enhanced DNA repair, altered apoptotic pathways, silencing of a number of genes, as well as drug inactivation, especially by glutathione transferase P1 (GSTP1). Indeed, GSTP1 has been recognized as the major enzyme responsible for the conversion of drugs most commonly used to treat metastatic ovarian cancer into less effective forms. Furthermore, GSTP1 may even be responsible for chemoresistance of non-GST substrate drugs by mechanisms such as interaction with efflux transporters or different signaling molecules involved in regulation of apoptosis. Recently, microRNAs (miRNAs) have been identified as important gene regulators in ovarian cancer, which are able to target GST-mediated drug metabolism in order to regulate drug resistance. So far, miR-186 and miR-133b have been associated with reduced ovarian cancer drug resistance by silencing the expression of the drug-resistance-related proteins, GSTP1 and MDR1. Unfortunately, sometimes miRNAs might even enhance the drug resistance in ovarian cancer, as shown for miR-130b. Therefore, chemoresistance in ovarian cancer treatment represents a very complex process, but strategies that influence GSTP1 expression in ovarian cancer as a therapeutic target, as well as miRNAs affecting GSTP1 expression, seem to represent promising predictors of chemotherapeutic response in ovarian cancer, while at the same time represent potential targets to overcome chemoresistance in the future.
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Affiliation(s)
- Petar Simic
- Obstetrics and Gynaecology Clinic Narodni Front, 11000 Belgrade, Serbia
| | - Igor Pljesa
- Gynaecology and Obstetrics Centre Dr Dragiša Mišović, 11000 Belgrade, Serbia
| | - Lazar Nejkovic
- Obstetrics and Gynaecology Clinic Narodni Front, 11000 Belgrade, Serbia
- Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
| | - Djurdja Jerotic
- Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
- Institute of Medical and Clinical Biochemistry, 11000 Belgrade, Serbia
| | - Vesna Coric
- Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
- Institute of Medical and Clinical Biochemistry, 11000 Belgrade, Serbia
| | - Jelena Stulic
- Obstetrics and Gynaecology Clinic Narodni Front, 11000 Belgrade, Serbia
| | - Nenad Kokosar
- Obstetrics and Gynaecology Clinic Narodni Front, 11000 Belgrade, Serbia
| | - Dunja Popov
- Obstetrics and Gynaecology Clinic Narodni Front, 11000 Belgrade, Serbia
| | - Ana Savic-Radojevic
- Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
- Institute of Medical and Clinical Biochemistry, 11000 Belgrade, Serbia
| | - Vladimir Pazin
- Obstetrics and Gynaecology Clinic Narodni Front, 11000 Belgrade, Serbia
- Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
- Correspondence: (V.P.); (M.P.-E.); Tel.: +381-0652225613 (V.P.); +381-11 3643249 (M.P.-E.)
| | - Marija Pljesa-Ercegovac
- Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
- Institute of Medical and Clinical Biochemistry, 11000 Belgrade, Serbia
- Correspondence: (V.P.); (M.P.-E.); Tel.: +381-0652225613 (V.P.); +381-11 3643249 (M.P.-E.)
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Simic P. [Opinion/comment from the perspective of a general practitioner]. Praxis (Bern 1994) 2011; 100:1187. [PMID: 21938713 DOI: 10.1024/1661-8157/a000671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Affiliation(s)
- P Simic
- FMH Innere Medizin, Praxisgemeinschaft Altstetten, Zürich.
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Erdeljic V, Francetic I, Ikic R, Bakran I, Makar-Ausperger K, Simic P. Is referring patients with a positive history of allergic drug reactions or atopy for allergy testing to local anesthetics justified? ACTA ACUST UNITED AC 2009; 31:177-82. [DOI: 10.1358/mf.2009.31.3.1354126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Grasser WA, Orlic I, Borovecki F, Riccardi KA, Simic P, Vukicevic S, Paralkar VM. BMP-6 exerts its osteoinductive effect through activation of IGF-I and EGF pathways. Int Orthop 2007; 31:759-65. [PMID: 17634942 PMCID: PMC2266664 DOI: 10.1007/s00264-007-0407-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2007] [Revised: 05/16/2007] [Accepted: 05/21/2007] [Indexed: 10/23/2022]
Abstract
We have recently shown that human recombinant BMP-6 (rhBMP-6), given systematically, can restore bone in animal models of osteoporosis. To further elucidate the underlying mechanisms of new bone formation following systemic application of BMPs, we conducted gene expression profiling experiments using bone samples of oophrectomised mice treated with BMP-6. Gene set enrichment analysis revealed enrichment of insulin-like growth factor-I and epidermal growth factor related pathways in animals treated with BMP-6. Significant upregulation of IGF-I and EGF expression in bones of BMP-6 treated mice was confirmed by quantitative PCR. To develop an in vitro model for evaluation of the effects of BMP-6 on cells of human origin, we cultured primary human osteoblasts. Treatment with rhBMP-6 accelerated cell differentiation as indicated by the formation of mineralised nodules by day 18 of culture versus 28-30 days in vehicle treated cultures. In addition, alkaline phosphatase gene expression and activity were dramatically increased upon BMP-6 treatment. Expression of IGF-I and EGF was upregulated in human osteoblast cells treated with BMP-6. These results collectively indicate that BMP-6 exerts its osteoinductive effect, at least in part, through IGF-I and EGF pathways, which can be observed both in a murine model of osteopenia and in human osteoblasts.
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Affiliation(s)
- W. A. Grasser
- Pfizer Global Research and Development, Groton Laboratories, Eastern Point Road, Groton, CT 06340 USA
| | - I. Orlic
- Department of Anatomy, School of Medicine, University of Zagreb, Zagreb, Croatia
| | - F. Borovecki
- Center for Functional Genomics, School of Medicine, University of Zagreb, Zagreb, Croatia
| | - K. A. Riccardi
- Pfizer Global Research and Development, Groton Laboratories, Eastern Point Road, Groton, CT 06340 USA
| | - P. Simic
- Department of Anatomy, School of Medicine, University of Zagreb, Zagreb, Croatia
| | - S. Vukicevic
- Department of Anatomy, School of Medicine, University of Zagreb, Zagreb, Croatia
- Laboratory of Mineralized Tissues, School of Medicine, University of Zagreb, Salata 11, 10 000 Zagreb, Croatia
| | - V. M. Paralkar
- Pfizer Global Research and Development, Groton Laboratories, Eastern Point Road, Groton, CT 06340 USA
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Vukicevic S, Simic P, Borovecki F, Grgurevic L, Rogic D, Orlic I, Grasser WA, Thompson DD, Paralkar VM. Role of EP2 and EP4 receptor-selective agonists of prostaglandin E2 in acute and chronic kidney failure. Kidney Int 2006; 70:1099-106. [PMID: 16871242 DOI: 10.1038/sj.ki.5001715] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We tested the efficacy of three selective agonists of prostaglandin E(2) (PGE(2)) receptor, EP2 (CP-536,745-01), EP2/4 (CP-043,305-02), and EP4 (CP-044,519-02), in two models of acute and chronic kidney failure. In the nephrotoxic mercury chloride (HgCl(2)) rat model of acute kidney failure systemically administered EP4 agonist reduced the serum creatinine values and increased the survival rate. Although the EP2 or the EP2/4 agonist did not change the serum creatinine values, the EP2 receptor agonist increased the survival rate. Histological evaluation of kidneys from EP4-treated rats indicated less proximal tubular necrosis and less apoptotic cells. In a rat model of chronic renal failure, the three receptor agonists decreased the serum creatinine and increased the glomerular filtration rate at 9 weeks following therapy. Kidneys treated with the EP4 agonist had less glomerular sclerosis, better preservation of proximal and distal tubules and blood vessels, increased convoluted epithelium proliferation and less apoptotic cells. Nephrectomy had no influence on the expression of the EP4 receptor, whereas EP2 receptor expression was reduced by 50% and then corrected following treatment with EP2 and EP2/4 receptor agonists. These findings suggest that PGE(2) has an important role in acute kidney failure via the EP4 receptor, whereas in chronic kidney failure both EP2 and EP4 receptors are equally important in preserving the progression of chronic kidney failure. Thus, agonism of EP2 and EP4 receptors may provide a basis for treating acute and chronic kidney failure.
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MESH Headings
- Acute Kidney Injury/metabolism
- Acute Kidney Injury/physiopathology
- Animals
- Dinoprostone/metabolism
- Disease Models, Animal
- Immunohistochemistry
- Kidney Failure, Chronic/metabolism
- Kidney Failure, Chronic/physiopathology
- Male
- Mercuric Chloride/toxicity
- Nephrectomy
- Rats
- Rats, Wistar
- Receptors, Prostaglandin E/agonists
- Receptors, Prostaglandin E/physiology
- Receptors, Prostaglandin E, EP2 Subtype
- Receptors, Prostaglandin E, EP4 Subtype
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Affiliation(s)
- S Vukicevic
- Laboratory of Mineralized Tissues, Department of Anatomy, Zagreb Medical School, University of Zagreb, Zagreb, Croatia.
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Bilic R, Simic P, Jelic M, Stern-Padovan R, Dodig D, van Meerdervoort HP, Martinovic S, Ivankovic D, Pecina M, Vukicevic S. Osteogenic protein-1 (BMP-7) accelerates healing of scaphoid non-union with proximal pole sclerosis. Int Orthop 2006; 30:128-34. [PMID: 16506027 PMCID: PMC2532081 DOI: 10.1007/s00264-005-0045-z] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2005] [Revised: 11/07/2005] [Accepted: 11/17/2005] [Indexed: 01/14/2023]
Abstract
We randomly assigned 17 patients with scaphoid non-union at the proximal pole to three treatment groups: (1) autologous iliac graft (n=6), (2) autologous iliac graft + osteogenic protein-1 (OP-1; n=6), and (3) allogenic iliac graft + OP-1 (n=5). Radiographic, scintigraphic, and clinical assessments were performed throughout the follow-up period of 24 months. OP-1 improved the performance of both autologous and allogenic bone implants and reduced radiographic healing time to 4 weeks compared with 9 weeks in group 1. Helical CT scans and scintigraphy showed that in OP-1-treated patients sclerotic bone was replaced by well-vascularised bone. The addition of OP-1 to allogenic bone implant equalised the clinical outcome with the autologous graft procedure. Consequently the harvesting of autologous graft can be avoided.
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Affiliation(s)
- R. Bilic
- Department of Orthopedic Surgery, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
| | - P. Simic
- Laboratory for Mineralized Tissues, Department of Anatomy, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
| | - M. Jelic
- Department of Orthopedic Surgery, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
- Laboratory for Mineralized Tissues, Department of Anatomy, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
| | - R. Stern-Padovan
- Department of Radiology, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
| | - D. Dodig
- Department of Nuclear Medicine, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
| | | | - S. Martinovic
- Laboratory for Mineralized Tissues, Department of Anatomy, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
| | - D. Ivankovic
- Department of Medical Statistics, Epidemiology and Medical Informatics, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
| | - M. Pecina
- Department of Orthopedic Surgery, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
| | - S. Vukicevic
- Laboratory for Mineralized Tissues, Department of Anatomy, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
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Francetic I, Bilusic M, Macolic-Sarinic V, Huic M, Mercep I, Makar-Ausperger K, Erdeljic V, Mimica S, Baotic I, Simic P. Inadequate Use of Preventive Strategies in Patients Receiving NSAIDs. Clin Drug Investig 2005; 25:265-70. [PMID: 17523777 DOI: 10.2165/00044011-200525040-00006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
OBJECTIVE Little is known about the factors that influence the decision to use NSAIDs in combination with gastroprotective drugs. The aims of this observational study were to evaluate the extent to which NSAID users are prescribed concomitant gastroprotective drug regimens ('preventive strategies'), and to determine how patient risk factors for NSAID-associated gastrointestinal toxicity and physician prescribing preferences influenced the decision to prescribe a gastroprotective drug in combination with an NSAID. DESIGN AND PATIENTS The study was conducted on 29 June 2004 and comprised 109 eligible adult patients hospitalised at the Clinical Hospital Center, Zagreb. Use of NSAIDs and gastroprotective drugs, risk factors for NSAID-associated gastrointestinal toxicity, and physician prescribing preferences were monitored throughout the study. RESULTS Sixty-six percent of patients receiving proton pump inhibitors or histamine H(2)-receptor antagonists with NSAIDs had no risk factors for gastrointestinal toxicity. Furthermore, 29% of patients who used NSAIDs had risk factors for gastrointestinal toxicity but were not receiving gastroprotective drugs. Even though patients at risk of NSAID-associated gastrointestinal complications had higher odds of receiving preventive strategies (odds ratio 1.25), the absolute rate of utilisation of these therapies in at-risk populations was unacceptably low (69%). However, the strongest independent correlation for gastroprotective drug use was the prescribing physician, with an odds ratio of 6.40. CONCLUSION This study demonstrates that an individual physician's prescribing style largely determines the odds of receiving preventive strategies with NSAID treatment and is more important than the patient's risk factors for gastrointestinal toxicity.
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Affiliation(s)
- I Francetic
- Department of Medicine, Clinical Hospital Rebro, Zagreb, Croatia
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Abstract
A previously unreported anomalous branch of the left common carotid artery (LCCA) was observed during dissection at the Zagreb Medical School. The anomalous branch arose from the anterior surface of the LCCA approximately 2 cm superior to the aortic arch, and subsequently bifurcated into a right and left branch. We describe its anatomic features. Clinical implications are also discussed.
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Affiliation(s)
- P Simic
- Department of Anatomy, School of Medicine, University of Zagreb, Zagreb, Croatia.
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Abstract
Bacterial mechanisms for the uptake of peptides and their hydrolysis to amino acids are known in great detail, whereas much less is known about the fates of the peptide-derived amino acids. We show that the addition of L-threonine-containing di- or tripeptides results in reduction of the growth of Corynebacterium glutamicum, with concomitant high intracellular accumulation of L-threonine to up to 130 mM. Using transposon mutagenesis and isolation of mutants with increased Thr peptide sensitivity, nine open reading frames (ORFs) were identified, almost all encoding hypothetical proteins of unknown function. Three ORFs encode membrane proteins. Their individual functional characterizations in the wild-type background led to the identification of thrE. Upon thrE overexpression, growth is no longer sensitive to the presence of the Thr peptide, and L-threonine is exported at a rate of 3.8 nmol min(-1) mg of dry weight(-1), whereas the rate of export of a thrE inactivation mutant is reduced to 1.1 nmol min(-1) mg of dry weight(-1). In addition to L-threonine, L-serine is also a substrate for the exporter. The exporter exhibits nine predicted transmembrane-spanning helices with long charged C and N termini and with an amphipathic helix present within the N terminus. All these data suggest that the carrier encoded by thrE serves to export small molecules such as L-threonine and that the carrier is a prototype of a new translocator family. Homologues of ThrE are present in Mycobacterium tuberculosis and Streptomyces coelicolor.
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Affiliation(s)
- P Simic
- Institut für Biotechnologie, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
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Abstract
The publication of Supporting People (Department of Social Security 1998) has given urgency to discussions around needs analysis, planning, user voice and the development of 'normal' housing for people with support needs. This paper explores a project, which aimed to design a collaborative model for identifying supported housing needs. We provide an overview of the research background, local imperatives and findings, and point to the probability of increasing conflict between the policy of developing 'sustainable communities' and the development of housing for people with support needs.
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Affiliation(s)
- M Foord
- School of Community, Health Sciences and Social Care, Faculty of Health Care and Social Work Studies, The University of Salford, Salford, UK.
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Bucher C, Simic P, Furrer J, Wüthrich B. [Mastocytosis: an important differential diagnosis in anaphylactoid reaction to Hymenoptera sting. A case report and overview of clinical aspects, diagnosis and current therapy of mastocytosis]. Praxis (Bern 1994) 2000; 89:411-418. [PMID: 10731856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A 77-year old farmer presented with a history of three severe anaphylactoid reactions after hymenoptera stings for the last three years. No sensitisation to hymenoptera venoms could be shown on allergological work-up. The serum level of tryptase however was clearly elevated (37.1 micrograms/l; normal value: < 13.5 micrograms/l). The diagnosis of systemic mastocytosis could be confirmed by bone marrow biopsy. Patients with mastocytosis are at increased risk of anaphylactic/anaphylactoid reactions. They should be educated how to avoid trigger factors and they should always carry an emergency kit (H1 blocker, corticosteroid, adrenalin) and a "mastocytosis pass" with them. Venom immunotherapy is indicated in patients with proven hymenoptera allergy. Selected patients at very high risk of anaphylactic reactions may need a continuous prophylactic medication with H1 and H2 blocker and eventually a cyclooxygenase inhibitor.
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Affiliation(s)
- C Bucher
- Dermatologische Klinik und Poliklinik, UniversitätsSpital Zürich
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Simic P, Benett IJ, Garrod D. Women's experience of maternity care in an inner city: a team-based qualitative study. Midwives (1995) 1995; 108:38-41. [PMID: 7621118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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Burijan J, Glisic L, Simic P, Bankovic S, Kostic K. [Malignant tumors of the liver]. SRP ARK CELOK LEK 1973; 101:69-75. [PMID: 4786462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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